Improvement in machines for bending hooks



@with STATES PATENT Fries.

It. B. SEARS, OF PROVIDENCE, RHODE ISLAND.

IMPROVEMENT IN MACHINES FOR BENDING HOOKS.

Specification forming part of Letters Patent No. 72,547, dated December 24, 1.867.

To all whom t may concern:

Beit known that I, R. B. SEARS, of Providence, in the county of Providence and State of Rhode Island, have invented a new and Improved Machine for Bending Hooks and I dol hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

Figurel represents a plan or top view of my improved machine for bending hooks, and

for other purposes. Figs. 2 and 3 are longitudinal sectional elevations of the same, show-v ing the parts in different positions. Fig. 4 is a vertical transverse section of the same, the:

plane of section being indicated by the line .fr Fig. 2. Fig. 5 is a side view of the hook, showing its shape before being bent.

Similar letters of reference indicate corresponding parts.

This invention relates to a new machine for bending wrought-iron or other hooks into the required shape and it consists in the use of a stationary or movable die, to which the lower end of the bar which is to be bent intoa hook is held by means of a follower or back-former,

lcarrying a pin or other device that fits through or around an eye formed in thelower end of the hook-bar. An oscillating presser or former bends the hook over the die or inside-former while the saine is clamped between the follower and die. The parts are all so arranged that they can be removed and replaced by others, so that hooks of various sizes can be bent upon the machine. The die or inside-former consists of two pieces, which can be separated for the easier insertion of the hook.

A represents the frame of the machine, made of wood, cast-iron, or other suitable material, of suitable size, land of sufficient strength to support the various parts constituting this machinery. It rests upon suitable posts or standards, B, as shown.

O is a horizontal cross-bar, forming part of the frame A, and arranged near the middle of the same. Upon the same is supported the die D. The die D consists of two pieces, a and b. The part a is firmly secured by means of screws or bolts, or maybe made movable upon the cross-bar C, or otherwise, while the part b slides upon the cross-bar, and is connected,by a sliding shaft, c, with a lever, d, pivoted to the side of the frame or box A, as is clearly shown in Fig. 4. The inner edges of the two parts a and b are beveled, so that when the two parts are together a groove is formed by them around the die D, as shown in Figs. 1 and 4. The shape of the edgeof the die B is like that of the hook to be formed as shown in Fig. 2.-

E is a follower or sliding block or backforiner, connected with a crank-shaft, F, which is driven by any suitable mechanism. The follower carries a pin or other device, e, which, when the follower is moved toward the die D or inside-former, fits into a cavity, f, providedin the die, as shown in Fig. 2. The follower, or back-former works on the rear side of the diethat is, on the straight back ofthe die on which the shank of the hook is formed.

G represents an oscillating earn or topformer. The same is iitted loosely around a shaft, H, having its bearings in cranks g g,

projecting from a fixed horizontal shaft, c, and fitted so as to turn loose around the same. The shaft His also connected, -by means of arms It h, with a revolving crankshaft, I, having its bearings in the frame A. Upon the xed shaft c is secured a toothed wheel, t', which does not revolve, and to the cain Gr is secured a toothed wheel,j, meshing into the v' f Thus, as theteeth of the wheel t', as shown. shaft I is revolved it oscillates, by means of its connections h l1, the shaft H, so that the latter swings around the shaft c as a center. Bysuch oscillating motion of the shaft H the wheel j is drawn over the wheel i, and is thereby oscillated around its own axis. The cam or top-former G, attached to the wheel j, does therefore receive a double oscillating motion once around the shaft c and again around the shaft H.

The bar from which the hook is to be formed is made of the destined thickness and shape, and an eye isformed at its lower end, as shown in Fig. 5. When the bar is to be inserted in the machine, theparts are in position shown in Fig. 3-that is, the follower E is drawn off the die, and the cranks of the shaft I and the arms h are in line with each other, so that. the cam or top-former Gr is about over the follower or back-former. The part b of the die D is drawn 0E the part a, by means of the lever d,

and the bar to be bent is then let down along the back of the die, so that its lower end rests upon the cross-bar C, as is clearly shown in Fig. 3. After the die has been closed, the shaft F is revolved, and thereby the follower or back-former E is moved toward the die or inside-former5 so that the pin cl will be fitted through the'eye of the bar to be bent into the cavity f, as shown in Fig. l. The face of the follower or back-former is grooved as well as that of the die or inside-former, and ofthe cam or top-former, and the shank of the hook is thus rmly clamped between the die and the follower, and is held by the pin e, or by any device that may be substituted. The motion of the shaftF is now stopped, and the shaft I is set in motion 5l thereby the cam or top-former G, which at the start was at the position shown by red lines in Fig. 2, is drawn over the upper end of the inside former or die, and is itself turned so as to be in the position shown by black lines in Fig' 2. After the shaft I has made one half revolution, the upper end of the bar has, by this motion of the cam, been bent around the upper part of the die or insidevformer, D, and has thereby been formed into a complete hook. The next half-revolution of the shaft I brings the cam G or top former back to its starting position. The motion of the shaft I is then stopped,and the shaft F is again rotated. The follower or back-former E will .thereby be drawn off', and the die and back part of the hook and the completely-formed hook released, and can be removed. The machine is then ready to rei ceivc another bar to be bent.

It will be noticed that the shafts I and F never revolve at the saine time, but that the one is always stopped when the other commences to move.

The shipping devices for throwing the'sc shafts in or outof gear can be Varied at pleasure, and neither the drivingI motionnor the shipper forms any part of my invention. This machine may also, with slight alterations, be used for bending eyes or other articles, `and I do not wish to confine its use to the bending of hooks merely.

Having thus described my invention, I

claim as new and desire Vto secure by Letters Patent-- 1. The arrangement of the crank-shaft I, arms h, shaft H, cranks g, 4shaft o, and gearwheels t' and j, all made and operating,` so as to impart a double oscillating' motion to the cam G, substantially as set forth.

2. Making the die or insideformcr I) of two parts, substantiallyas and for the purpose herein shown and described.

3. In combination with the above, the die D, made in two parts, and the follower E, all constructed, arranged, and operating substan tially as described and represented.

4. The combination of the cavity b, die D, pin e, and follower E, as and for` the purpose described.

5. rIhe combination of the follower E, crankshaft F, and pin c, substantially as described and represented.

R. B. SEARS.

Witnesses:

G. H. GRANsToN,

PHILIP C. Sco'r'r. 

